|Microsoft DirectX 9.0|
The put__MediaMajorType method sets the DirectShow media major type.
HRESULT put__MediaMajorType( REFCLSID MediaMajorType );
[in] REFCLSID that specifies the media major type.
Returns S_OK if successful. If the method fails, error information can be retrieved using the standard COM IErrorInfo interface.
This method is available through C++ only. Note the two underscores in the method name as compared to the one underscore for the method that uses a BSTR as a parameter.